Rough idle, random no start and runs very reach plus ABS/DSC issues

[BMWerke]

Hello,

I purchased a 2007 760Li with about 70K. The previous owner told me that the car recently had coils and spark plugs replaced.

When we bought the car, it was idling rough on both banks and the transmission was shifting somewhat hard. The car runs rich and uses gas like nothing else (A short drive ~3 miles and less than half an hour of idling used about a quarter of a tank. ). We pulled many codes but one caught our attention.

0029E2 DME: Fuel injector rail, pressure sensor signal

We monitored the rail pressure at idle and at around 3000 rpm. In case of idle, the set point was about 430psi and the actual value was about 120psi. Under load, the set point was about 1400psi and the actual value was around 220psi. We thought that the HPFPs were not working properly. We replaced the diaphragms for both pumps as described here:

https://www.bimmerfest.com/forums/sh...d.php?t=846470

There is still a huge difference in setpoint and actual rail pressure. After that, it seems that the car is running even richer. After just several seconds of idling, I can see soot on the garage floor under the tailpipe. In the meantime, we found the IVM module had a bad looking solder joint and attempted to fix it by re-soldering it. There was no real change in the way the car runs, so we may not have been successful. It may have addressed the intermittent no start no crank but all the other issues are still there.
Here are the list of codes from ISTA:

Code	Description	Existent
0029CC	DME: Combustion misfires, several cylinders	No
0029CC	DME2: Combustions miss, bank 2, several cylinders	No
0029D2	DME: Combustion misfires, cylinder 6	No
0029D5	DME2: Combustion misfires, cylinder 9	No
0029E2	DME: Fuel injector rail, pressure sensor signal	Yes
002C71	DME: Oxygen sensor after catalytic converter	No
0051B0	EGS: Message (brake light switch) from DSC implausible	Yes
005D36	CIM Hall sensor inclination	Yes
005E9A	DSC: Valve Relay	Yes
006278	ARS: Predrive check	No
0093FC	SGM-SIM: Undervoltage	No
009C7A	IHKA: Water valve, right	No
009CAB	LM: One terminal 15 missing	No
009D29	CDC: Changer mechanism, unload	yes
00A0B0	CAS: input, brake lights, implausible	No
00A0B5	CAS: Fault, road speed signal	No
00A391	TCU: Fault, main telephone aerial	No
00A751	Message error (swivel motion blocked) NVE receiver, DSC transmitter	Yes
00A754	Message error (vehicle speed, 0x1A0) NVE receiver, DSC transmitter	Yes
00A8AC	LM E60/E61/E65/RR01: left clearance light faulty, E63/E64/RR02: left supplement	Yes
00A8AC	LM License-plate light, right faulty	Yes
00A0B5	CAS: Fault, road speed signal	No
00CF19	No message from DSC, receiver DGK/EGS, transmitter KOMBI/LDM/DSC	No
00CF1A	No message from DSC, receiver DGK/EGS, transmitter DSC/DME-DDE	No
00D13E	Message from control unit, receiver RDC	No
00D712	Message error (speed, 0x1A0), receiver EHC	No
00E518	No message (status driving light, 0x314), receiver LM, transmitter RLS	No
00E51A	No message (yaw rate) from DSC, receiver LM, transmitter DSC	No

Where should we look next? We were thinking of trying a new IVM module because we are inexperienced at soldering and possibly messed it up. Is there any data we can collect that would tell us what else to look at?
How about the rail pressure sensor?

Thanks

Update: Last night, we used ISTA to look at the rail pressure setpoint and actual values at idle. For DME1, the set point was 3MPa and the actual value was 0.8MPa. For DME2, the set point was 3MPa and actual value was fluctuating around 3MPa (give or take .1 or .05Mpa). We haven't tested the pressures under load yet. At least according to the numbers we are getting at idle, looks like HPFP for bank 2 is able to keep up with and deliver the pressure needed. This is good news in that the new diaphragm we put in is doing its job (at idle anyway). However, looks like the HPFP for bank 1 doesn't deliver the needed pressure (0.8 ipo 3Mpa). Given that we used the same diaphragm for both pumps and repaired them the same way, I am wondering if our rail pressure sensor on bank 1 is really defective per 29E2 code that we are getting. We will try to play some swaptronics to see if the low pressure follows the sensor or stays with the pump. What do you think?

[housurfer]

did you figure it out yet? I have a 2008 bmw 760li with 52000 miles and has same symptoms.